package com.py.user.gateway.filter;

import com.py.user.gateway.util.AppJwtUtil;
import io.jsonwebtoken.Claims;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.util.StringUtils;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

/**
 * @Description TODO
 * @Author bo.li
 * @Date 2022/11/7 15:49
 * @Version 1.0
 */
@Component
@Slf4j
public class AuthFilter implements Ordered, GlobalFilter {

    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        //判断是否登录，从header拿到token，如果没有token，认为没登录，token过期，未登录，其他放行
        //login  swagger
        ServerHttpRequest request = exchange.getRequest();
        ServerHttpResponse response = exchange.getResponse();

        String path = request.getURI().getPath();
        log.info("---------->{}",path);
        if(path.contains("login")){
            return chain.filter(exchange);
        }
        String token = request.getHeaders().getFirst("token");
        log.info("token:{}",token);
        if(StringUtils.isEmpty(token)){
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            return response.setComplete();
        }

        //5.判断token是否有效
        try {
            Claims claimsBody = AppJwtUtil.getClaimsBody(token);
            //是否是过期
            int result = AppJwtUtil.verifyToken(claimsBody);
            if(result == 1 || result  == 2){
                response.setStatusCode(HttpStatus.UNAUTHORIZED);
                return response.setComplete();
            }

            Object userId = claimsBody.get("id");

            ServerHttpRequest serverHttpRequest = exchange.getRequest().mutate().headers(httpHeaders -> {
                httpHeaders.add("userId",userId + "");
            }).build();

            exchange.mutate().request(serverHttpRequest).build();
        } catch (Exception e) {
            e.printStackTrace();
        }

        return chain.filter(exchange);
    }

    @Override
    public int getOrder() {
        return 0;
    }
}